Gamma Uniformity Correction Method and System

Abstract

A method and system are provided for performing gamma correction on display data. Aspects the exemplary embodiment include using at least a portion of the display data to fetch in parallel from a table memory a gamma correction data value stored at an odd address and a gamma correction data value stored at an even address; detecting when the display data comprises a low address; and in response to detecting that the display data comprises a low address, performing a right shift on the gamma correction data values, thereby decreasing the values of the gamma correction data prior to performing interpolation on the gamma compensation data values.

Description

CROSS-REFERENCED TO RELATED APPLICATIONS[0001]The present application is related to co-pending patent application US Application No. ______ entitled “Display Uniformity Correction”, and US Application No. ______ entitled “Frame Rate Control Method and System”, filed on the same date as the present application and assigned to the same assignee.BACKGROUND OF THE INVENTION[0002]Flat panel displays are becoming the display of choice for laptop, desktop, and handheld computers alike. There use in televisions is also growing. Flat-panel type displays can take a variety of forms, the most common of which is the liquid crystal type display. Other types include light emitting diode (LED) displays and plasma displays. Liquid crystal displays (LCD) include an active matrix type, which are also called TFT (Thin Film Transistor) type, and a passive matrix type, which are also called STN (Super Twisted Nematic) type. Both of these are available in monochromatic or color versions. STN types of fla...

AI Technical Summary

Benefits of technology

[0005]A method and system are provided for performing gamma correction on display data. Aspects the exemplary embodiment include using at least a portion of the display data to fetch in parallel from a table memory a gamma correction data value stored at an odd address and a gamma correction data value stored at an even address; detecting when the display data comprises a low address; and in response to detecting that the display data comprises a low address, performing a right shift on the gamma correction data values, thereby decreasing the values of the gamma correction data prior to performing interpolation on the gamma compensation data values.

[0006]According to the method and system disclosed herein, the exemplary embodiment improves overall image quality of the display device by performing a right shift or otherwise decreasing gamma correction data values for low display data addresses to allow finer interpolation to be performed on those gamma compensation data values.

Problems solved by technology

As the size of a flat panel becomes larger, it becomes increasingly difficult to maintain the same characteristics of flat-panel uniformly over the screen.

The magnitude of the non-uniformities appearing in larger displays may also increase the likelihood that new display devices or early stage product of the existing display devices will create yield issues for manufacturers during production.

Images